Telephone system



Jan. 3, 1928.

J. W. DEHN TELEPHONE sYs'rEu Filed Nav. 30. 1926 Patented Jan. 3, 192,8.UNlTEDsTATES PATENTOFFICE.

JOSEPH W. DEHN, on BROOKLYN, NEW YORK, AssrGNon To. BELL 'rELE'rHoN'ELABORA- TORIEs, INCORPORATED, or NEW YORK, N. Y., A CORPORATION OE NEWYORK.

TELEPHONE B YB'IEI.

Application iled November 30, 1926. Serial 1ro. 151,601.

This invention relates to telephone systems and more particularly tomessage register circuit arrangements tor such systems. n

According to this invention a metering 5 system including a subsoribersservice meter Y and an operators position meter, together with a key anda double wound relay at the operators position, are so arranged that thedepression of the key operates the service meter and shunts one windingof the relay without causing it to operate, andthe operation of saidservice meter alters the shunt in such a `manner as to allow 'the relay'to actuate, in turn operating the. position meter. This arrangementimproves the marginal operatin characteristics of a marginal relay or eectromagnetic device used in tele phone systems for recording and.indicating purposes. A marginal relay and aclrcuit therefor may beemployed in message vregister circuits where this circuit is part of theusual sleeve circuit between a subscribers line and a cord circuit andwhere it is desired to have the marginal relay operate after the usualline message register 1n this sleeve circuit has been actuated. Themarginal relay be employed to actuate a osit-ion meterv and also ifdesired to lig t a signal to indicate the actuation of the messageregister. Y

The invention has been illustrated in the accompanying drawings in whicha diagrammatic presentation has been made of a callin line, a messageregister therefor and a ca led line as well as a cord circuit in whichhas been incorporated a marginal relay, a osition meter and a signallamp controlled y said relay and the circuit vmeans therefor arearranged in accordance with this inven tion.

Referri-n now to the drawing, l indicates acalling su scribers line; 2 amessa e register for recording calls made by t e sublscriber of thisline.; 3 indicates a cord circuit in diagrammatic form for connectingline 1 With a called line 4; While 5 shows Va polarized marginal relayarranged to control a position meter 6 and lamp 7 when a key 8 isactuated to connect it tothe sleeve circuit of cord 3. s

The operation lof the invention when apcalling line l to the cordcircuit 3 in the usual manner, a circuit is closed from bat-y tery 15through the sleeveeircuit, the terminals of the answering plug 13 andthe ca1l-. ing subscribers jack 14, through the windings of the callingline message register 2 to ground. This circuit extends also through theWinding of the usual cut-cifrelay 16V for the operation of the out-ottvrelay. As is well known in the art, the sleeve circuit extends throughthe windings of the message Vregia- -ter 2 in order that the messageregister may be controlled over a portion of the sleeve circuit ywithouthowever being actuated when for the operation of the cutoff relay.

YlVhen it is desired to -actuate the message register 2 to record thecallover line 1 and to actuate the relay' to operate the posi tion meter6 to count the kcall at the -position and to light the lamp 7 toindicate to the operator that the message register 2 has o erated, key 8is depressed; To cause the a ve operations to take place in the ordermentioned, the marginal relay 5 is provided with two windings ofdifferent resistances, the left hand winding of comparatively lowresistance and the right hand Winding of comparatively high resistanceconnected lin .the circuit is completed through battery 15 seriesopposition through a high voltage .Y

battery 17. The voltage of this battery 17 is higher than that ofbattery 15 in order to secure the operation of message register 2 inrthe' manner hereinafter described.

VWith this arrangement the following operations will take place when key8 is actuated:

shunted and the combined resistance of the windings of-message register2 and the left hand winding of relay 5 is suchas to cause Y 5 to loecomenearly equal. This arrangement causes the operation oit' messageregister 2 as the current in the sleeve circuit is increased due to thehigh voltage ot loattery 17, but prevents theoperation Voit relay 5 asthe two windings of this relay are in opposition as hereinheliorementioned. Upon the operationo't message register 2 the right handwinding oi" this rregister is short circuited through the armature andfront contact ot' the register to ground.` A.YVhen this takes place theampere turns through the let't hand winding of relay 5 become greaterthan the ampere turns through the right handwinding and under theseconchtions relayv 5-will operate to attract its armature.Thefattrac-tion of the armature of relay 5lcauses an obvious circuit tobe closed for the lighting of lamp 7 which thereby notifies the operatorof the operation of the message register 2 and this armature will alsoclose an obvious circuit for the "position register 6 to cause it tovbecome actuated to count the call.

In an arrangement of this sort the marginal relay 5, the positionregister 6 and the lamp 7 are' common to a plurality ot cord circuits,such as 8. l a' The relay 5 is also polarized in such a manner'that theVhigh resistance winding tends to operate the armature vaway from thecontact. The purpose ot this is to guard against a momentary operationoit relay 5 at the instant the lower contacts of lreyl 8 are closed andprior to the closure ot the upper contacts of said key.

It is evident that the particular arrangement shown is only typical otthe application ot this invention to a particular system and that theinvention may readily he used in various other systems without departing'from the spirit thereof.

-What is claimed is: f

1. In a telephone system, a line, a meter associated therewith, a sourceot current, an electromagnet having a pair ot windings arranged inseries opposition with said source, means for placing a shunt about oneoi said windings and for actuating said meter, and means responsive tothe actuation of said meter for changing said shuntto cause theactuation of said electromagnet.

' 2. In a telephone system, a line, a meter associated therewith, asource yoit current, an electromagnet having a high resistance windingand a low resistance vwinding arranged in series opposition 'with saidsource, means for partially shunting the high resistance winding tocause the ampere turns ot both of the windings of said electromagnet tobecome substantially equal and :fior actu atingsaid meter and meansresponsive to the actuation of said meter :for further shunting .saidVhifrh resistance winding to change the relative ampere turns of saidwindingsvto cause the actuation of said electromagnet.

3. In a telephone system, a line, a meter associated therewith, a sourceof current, an electromagnet having a high resistance winding and a lowresistance winding arranged in series oppositionwith said source, meansfor partially shunting the highresistance winding to cause the ampereturns of both ot the windings of said electromagnet to becomesubstantially equal and for actuating said meter, meansl responsive tothe 'actua-- tion of said meter for further shunting said highresistance 'winding to change the ainpere turns of both of said windingstoA cause the actuation of said electromagnet, and a signaling meansactuated Vloy theoperation of said electromagnet'to indicate theoperation of the meter. v A 1 4:. In'a telephone system, aV callingline, a called line, a meter and a cut-oft relay associated with thesleeve circuit of' said calling line, a lcord circuit for connectingsaid lines, including a sleeve circuit, means responsive to theconnection of the cord circuit Vto the calling line fory actuating saidcut-oft relay and ior preparing a circuit 'for said meter, a source ofcurrent, anelectromagnet having two windings associated with saidsourceot current in series opposition, means for connectingsaid windingsto the sleeve circuits of the cord circuit" and the calling line so astocau'se t-he actuation of thel meter, and means responsive to VtheactuationV of the said meter 'for-changing Vthe connection of saidwindings through the sleeve circuits so as to cause the actuation ofsaid electromagnet. j

5. In a telephone system, a calling line, al calledline, a meterassociated with the sleeve circuit of the calling linefa cord circuitin-A cluding a sleeve circuit and arranged for connecting said lines,means responsiveto the connection'of the cord circuit to the callingline :tor actuating s aid cut-oi'relay and i'or preparing ya circuit`for said meter, asource of current, van electromagnetic de vice'havingtwo windings associated with said source of current'in seriesopposition,

means for connecting said windings'and source ot'current to saidsleeve'circuits to causek the actuation of said meter without the actuation otsaid electromagnetic device, means responsive to the connection ofsaid*v electromagnetic device in the sleeve circuits and the actuationof the meter for operating said electromagnetic device, and means meterassociated therewith, asource of curi l rent, an electromagnet having apair of windings and a polarized armature, said windings connected inseries opposition with said source, switching means for connecting theservice meter n shunt to one of said windings to cause the operation ofsaid mete1',and means responsive to the operat1on JOSEPH W. DEHN.

